AO Silver Member
Join Date: Jan 2003
Location: idle to 7500rpm
I haven't tried Ultrac, but I can tell you that Conti SportContact II are very quiet with very good ride comfort. I drove the black 156 with GTA rims (see Image Lounge "156 from Thailand") against my car with Yokohamas AVS Sport over the weekend. The Conti is also quieter than Yoko ES-100 while providing similar ride quality.
If you're concern with noise, anything with more straight line patterns and narrower gap between threads 'usually' have lower noise than these directional looking ones.